From: Robert Klemme <shortcutter@...>
Date: 2008-03-25T23:49:00+09:00
Subject: Re: Help parsing and extracting a num

2008/3/25, Iņaki Baz Castillo <ibc@aliax.net>:
> Hi, I'm trying to extract a num from a string. This string is in fact
>  some number of headers separated by \r\n or \n. for now I just need to
>  extract the value of "Content-Length" (case insensitive) header.

Why don't you use Net::Http?  IIRC this gives you individual header
fields already.

>  For example:
>
>  irb> headers = "Via: via1,via2,\r\n via3\r\nFrom:
>  from_user@domain\nContent-length: 22\r\nTo: to_user@domain\n"
>
>  I do the following:
>
>  irb> headers.scan(/content-length\s*:\s*([0-9]*)/i).to_s.to_i
>  => 22
>
>  In case the "Content-Length" header exist but has empty value I get 0
>  with the above code (that's what I need in fact).
>
>  Is there any way faster to do the same? any help?

headers[/content-length:\s*(\d+)/i, 1].to_i

Cheers

robert

-- 
use.inject do |as, often| as.you_can - without end